Mixed Ionic and Electronic Conductivity in a Tetrathiafulvalene-Phosphonate Metal–Organic FrameworkClick to copy article linkArticle link copied!
- Catarina RibeiroCatarina RibeiroDepartment of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-393 Aveiro, PortugalMore by Catarina Ribeiro
- Bowen TanBowen TanDepartment of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts02139, United StatesMore by Bowen Tan
- Flávio FigueiraFlávio FigueiraDepartment of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-393 Aveiro, PortugalMore by Flávio Figueira
- Ricardo F. MendesRicardo F. MendesDepartment of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-393 Aveiro, PortugalMore by Ricardo F. Mendes
- Joaquín CalboJoaquín CalboInstituto de Ciencia Molecular (ICMol), Universidad de Valencia, c/Catedrático José Beltrán, 2, 46980 Paterna, SpainMore by Joaquín Calbo
- Gonçalo ValenteGonçalo ValenteDepartment of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-393 Aveiro, PortugalMore by Gonçalo Valente
- Paula EscamillaPaula EscamillaCIQUS, Centro Singular de Investigación en Química Bioloxica e Materiais Moleculares, Departamento de Química-Física, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, SpainMore by Paula Escamilla
- Filipe A. Almeida PazFilipe A. Almeida PazDepartment of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-393 Aveiro, PortugalMore by Filipe A. Almeida Paz
- João RochaJoão RochaDepartment of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-393 Aveiro, PortugalMore by João Rocha
- Mircea DincăMircea DincăDepartment of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts02139, United StatesMore by Mircea Dincă
- Manuel Souto*Manuel Souto*[email protected]CIQUS, Centro Singular de Investigación en Química Bioloxica e Materiais Moleculares, Departamento de Química-Física, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, SpainDepartment of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-393 Aveiro, PortugalOportunius, Galician Innovation Agency (GAIN), 15702 Santiago de Compostela, SpainMore by Manuel Souto
Abstract
Mixed ionic-electronic conductors have great potential as materials for energy storage applications. However, despite their promising properties, only a handful of metal–organic frameworks (MOFs) provide efficient pathways for both ion and electron transport. This work reports a proton–electron dual-conductive MOF based on tetrathiafulvalene(TTF)-phosphonate linkers and lanthanum ions. The formation of regular, partially oxidized TTF stacks with short S···S interactions facilitates electron transport via a hopping mechanism, reporting a room-temperature conductivity of 7.2 × 10–6 S cm–1. Additionally, the material exhibits a proton conductivity of 4.9 × 10–5 S cm–1 at 95% relative humidity conditions due to the presence of free −POH groups, enabling efficient proton transport pathways. These results demonstrate the potential of integrating electroactive building blocks along with phosphonate groups toward the development of mixed ionic-electronic conductors.
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